<!DOCTYPE html>
<script>
window.testIsAsync = true;
</script>
<body>
<svg width="300" height="200">
  <image width="100" height="200" preserveAspectRatio="none"
         xlink:href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='50' height='50'><rect width='100%' height='100%' fill='green'/></svg>"></image>
</svg>
</body>
